JPH04112210U - optical transmission equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To fix optical fiber cables without ferrules in optical transmission equipment. [Structure] An optical fiber cable 11 is inserted into an insertion hole 13 of a holder 14 without a ferrule. The clamping body 18 is pressed toward the holding body 14 to sandwich and fix the optical fiber cable 11. a groove 27 for sandwiching the optical fiber cable 11;
28 is made eccentric with respect to the optical axis of the optical fiber cable 11 to improve the holding force.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to optical transmission equipment using optical fiber cables, and in particular to optical fiber cables. This relates to the structure of the data link.

0002

[Conventional technology]

A conventional optical transmission device has a connector at the tip of an optical fiber cable 1, as shown in Figure 6. A shaped ferrule 2 is attached to the insertion hole 4 of the holder 3 that holds and stores the optical semiconductor element. , the optical fiber cable 1 is held by inserting the ferrule 2.

0003 Here, the ferrule 2 and the holder 3 are connected in the optical axis direction (extension of the fiber) in the insertion hole 4. It has a structure that allows it to be attached and detached by pulling it out in the longitudinal direction.

0004

[Problem that the idea aims to solve]

In the prior art, an optical device having a connector-shaped ferrule 2 as shown in FIG. The fiber cable 1 is expensive due to the materials used for its ferrule 2. It becomes the value. Also, a large space is required for the holder 3 to fix the ferrule 2. This is important and hinders miniaturization.

[0005] In view of the above-mentioned problems, the present invention has been developed to attach optical fiber cables to a holding body without using ferrules. Our aim is to provide an optical transmission device that can be easily installed and has a smaller holding body. target

[0006]

[Means to solve the problem]

The means for solving the problem according to claim 1 of the present invention is as shown in FIGS. 11 and an optical semiconductor element 1 that transfers light between the optical fiber cable 11 and the optical fiber cable 11. 2, the optical fiber cable 11 is arranged so that the end thereof faces the optical semiconductor element 12. A holder 14 having an insertion hole 13 for inserting the fiber cable 11; It communicates with the insertion hole 13 of the holder 14 in a direction perpendicular to the optical axis of the optical fiber cable 11. A recess 15 is formed to be open, and a hole is inserted through the opening 16 of the recess 15 to the bottom wall 17 side. a clamping body 18 for clamping and fixing the optical fiber cable 11 inserted into the cable; A device equipped with a pressing means 19 for pressing the holding body 18 toward the bottom wall 17 side of the insertion hole 13. It is.

[0007] The problem solving means according to claim 2 of the present invention is the optical transmission device according to claim 1, which includes: The optical fiber cable 1 is attached to the bottom wall 17 of the recess 15 and the opposing surfaces of the holding body 18. Grooves 27 and 28 having approximately the same diameter as 1 are formed to face each other, and both grooves 27 and 28 are It is formed eccentrically with respect to the optical axis of the optical fiber cable 11.

[0008] The problem solving means according to claim 3 of the present invention is that the pressing means 19 according to claim 1 is An engagement piece provided on either one of the body 14 and the clamping body 18 for engaging with the other 31, and an engagement groove 32 provided on the other side for engaging with the engagement piece 31. It is what was done.

[0009] The problem solving means according to claim 4 of the present invention is as shown in FIGS. The means 19 is integrally formed between the holding body 14 and the clamping body 18, and inserts the clamping body 18 into the insertion hole. It is composed of an elastic piece 41 that can be elastically deformed so as to bias it toward the bottom wall 17 of 13. It is something that

0010

[Effect]

In the problem solving means according to the above claims 1, 3 and 4, the optical fiber cable 11 When fixing, hold the optical fiber cable 11 with end face treatment without ferrule. It is inserted into the insertion hole 13 of the body 14.

[0011] Then, the pressing means 19 presses the clamping body 18 toward the bottom wall 17 side of the recess 15, and The optical fiber cable 11 is held between the holding body 18 and the bottom wall 17 of the recess 15. Ru.

0012 Then, the optical fiber cable 11 can be fixed without a ferrule.

[0013] In the problem solving means according to claim 2 above, the optical fiber cable 11 is sandwiched. The grooves 27 and 28 for holding the optical fiber cable 11 are polarized with respect to the optical axis of the optical fiber cable 11. Since the grooves 27 and 28 are carefully formed, the optical fiber cable can be easily Compared to holding 11, the holding force can be improved and the ferrule is omitted. The optical fiber cable 11 can be held against strong external forces even when the optical fiber cable 11 is exposed to strong external force.

[0014]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings.

[0015] (First example) Figure 1 is an exploded perspective view of an optical transmission device showing a first embodiment of the present invention, and Figure 2 is an exploded perspective view of the same. 3 is a sectional view taken along line AA, and FIG. 3 is a sectional view taken along line BB.

[0016] As shown in the figure, the optical transmission device of this embodiment includes an optical fiber cable 11 and an optical fiber. an optical semiconductor element 12 that transfers light to and from the fiber cable 11; The optical fiber cable is arranged so that the end of the fiber cable 11 faces the optical semiconductor element 12. 11, and the insertion hole of the holder 14. 13 and open in a direction perpendicular to the optical axis of the optical fiber cable 11. The optical fiber inserted into the bottom wall 17 side from the opening 16 of the recess 15 A clamping body 18 for clamping and fixing the cable 11, and a clamping body 18 inserted into the insertion hole. 13 is provided with a pressing means 19 for pressing toward the bottom wall 17 side.

[0017] The optical fiber cable 11 is a bare fiber with a high refractive index, as shown in FIGS. -21 is covered with a coating resin 22, which has a double structure, and the edges are treated. . Since the optical fiber cable 11 is provided with the clamping body 18, the optical fiber cable 11 is Rules are omitted.

[0018] The optical semiconductor element 12 is a laser diode or a photodiode, as shown in FIGS. The board and the like are molded into a rectangular parallelepiped shape using a translucent resin.

[0019] As shown in FIGS. 1 and 2, the holder 14 is made of light-shielding wood to prevent disturbance light from entering. It is formed into a roughly box shape made of fat or the like. The rear part of the holder 14 is provided with the optical semiconductor element. A storage chamber 24 for storing the child 12 is formed. The center of the front surface 25 of the holder 14 The insertion hole 13 is formed between the storage chamber 24 and the storage chamber 24 .

[0020] An opening 16 is formed on the upper surface from the center of the insertion hole 13 to the upper surface of the holder 14. The recessed portion 15 is formed. The recess 15 penetrates the left and right side surfaces of the holding body 14. It is formed to do so. The insertion hole 13 is inserted into the recess 15 as shown in FIG. A groove 27 is formed in the bottom wall 17 portion, and the groove 27 is formed in the optical fiber cable 1. It is formed into a semicircular cross section with approximately the same diameter as 1.

[0021] As shown in FIGS. 1 to 3, the holding body 18 is made of the same light-shielding resin as the holding body 14. , is formed to have approximately the same width as the recess 15, and can be inserted into the recess 15 of the holding body 14. ing. The lower surface of the holding body 18, that is, the opposing surface facing the bottom wall 17 of the recess 15 A groove 28 having approximately the same diameter as the optical fiber cable 11 is formed opposite to the groove 27. has been completed.

[0022] The pressing means 19 includes engagement pieces 31 integrally formed on both sides of the holding body 18, respectively. , and engagement grooves 32 formed in the lower portions of both sides of the holding body 14, respectively.

[0023] The engagement piece 31 engages with the engagement groove 32 of the holder 14, as shown in FIGS. and an engaging claw 34 that is elastically deformable so as to bias the engaging claw 34 inward. It consists of a base 35 and a knob 36 attached to the top of the base 35.

[0024] The engaging claw 34 is formed at the lower end of the base 35, as shown in FIG. A guide slope for abutting and guiding the end of the bottom wall 17 of the recess 15 when attached to the 34a, and is formed into a contract shape.

[0025] The length dimension of the base portion 35 is such that when the engaging claw 34 is engaged with the engaging groove 32, The lower surface 38 of the body 18 is set to be in contact with the bottom wall 17 of the recess 15. .

[0026] The connecting point 39 between the knob portion 36 and the base portion 35 is located on the side of the holding body 18. It is integrally molded so that it is rotatably supported at the upper end of the section. And both the knobs By pinching 36 inward, the base 35 and the engaging claw 34 move around the connecting point 39 as a fulcrum. The engagement claw 34 is rotated outward as shown in FIG.

[0027] The engagement groove 32 is formed by notching a lower end corner of the holder 14 to correspond to the engagement claw 34. ing.

[0028] In order to increase the holding power of the optical fiber cable 11, the bottom wall of the recess 15 is 17 and the groove 28 on the lower surface 38 of the holding body 18 are formed in the optical fiber cable 1. It is formed eccentrically downward with respect to the optical axis of 1.

[0029] In addition, 12a in the figure is an external terminal of the optical semiconductor element 12.

[0030] In the above configuration, the procedure for fixing the optical fiber cable 11 to the holder 14 is as follows: This will be explained based on FIG.

[0031] First, the end face-treated optical fiber cable 11 without a ferrule is attached to the holder 1. 4 into the insertion hole 13.

[0032] Next, the holding body 18 is inserted into the recess 15 of the holding body 14. At this time, the engaging claw 34 are brought into contact with each end of the bottom wall 17 of the recess 15 and pressed further downward to open the base 35. Elastically deforms outward. Then, when the engaging claw 34 comes to the position of the engaging groove 32, the base 35 is elastically restored inward, and the engagement claw 34 engages with the engagement groove 32.

[0033] At the same time, the lower surface 38 of the clamping body 18 comes into contact with the bottom wall 17 of the recess 15. stop The optical fiber cable 11 is connected to the grooves 27 and 28 formed on both opposing surfaces 17 and 38. Just hold it by holding it in place.

[0034] In addition, when removing the optical fiber cable 11 from the holder 14, first Hold both the tabs 36 of the piece 31 inward, rotate the base 35 outward, and release the engaging claw 3. 4 and the engagement groove 32 is released. Then, while holding the knob part 36, Pull out 18 upwards.

[0035] After that, the optical fiber cable 11 can be pulled out from the insertion hole 13 in the optical axis direction. .

[0036] In this way, the clamping body 1 is inserted into the recess 15 to sandwich the optical fiber cable 11. 8 and a pressing means 19 for pressing the holding body 18 against the bottom wall 17 of the recess 15. Therefore, even if the optical fiber cable 11 is not provided with a ferrule, the optical fiber cable 11 can be The cable 11 can be easily fixed to the fiber optic cable 11. Therefore, the number of parts It is possible to reduce the size of the holding body 14 and reduce the manufacturing cost.

[0037] Further, both grooves 27 and 28 are shaped eccentrically with respect to the optical axis of the optical fiber cable 11. Therefore, the optical fiber cable 11 can be pinched only by the frictional force of the pressing means 19. The holding force can be improved compared to holding it. Therefore, omitting the ferrule Also, the optical fiber cable 11 can be continued to be held against strong external forces.

[0038] (Second example) FIG. 4 is a perspective view of an optical transmission device showing a second embodiment of the present invention, and FIG. -C sectional view.

[0039] As shown in the figure, the pressing means 19 of the optical transmission device of this embodiment includes a holding body 14 and a clamping body 1. 8 is integrally molded between the clamping body 18 and the bottom wall 17 of the insertion hole 13. It is made up of an elastic piece 41 that is elastically deformable.

[0040] The elastic piece 41 forms a bridge from the upper end of the front surface of the holding body 18 to the mouth wall 42 of the recess 15. It is suspended and can be elastically deformed in the vertical direction.

[0041] Further, on both sides of the holding body 14 of this embodiment, the elastic pieces 41 are lifted upward. An insertion opening 43 is formed into which a rod-shaped jig (not shown) is inserted. The insertion port 43 is formed in a hook shape, and as shown in FIG. In order to be able to push up the lower surface 41a of the elastic piece 41, the lower surface 41a is is also placed above.

[0042] The other configurations are the same as in the first embodiment.

[0043] In the above configuration, when inserting the optical fiber cable 11, first, a rod-shaped jig is used. is inserted into the insertion opening 43 on the side of the holder 14, and the jig is brought into contact with the lower surface 41a of the elastic piece 41. and lift it until it touches the upper end 43a of the insertion port 43, and remove the elastic piece 41 and the clip. Push up the holding body 18.

[0044] Next, the optical fiber cable 11 is inserted into the insertion hole 13.

[0045] After that, the jig is removed and the elastic piece 41 is set in a free state. Then, the elastic piece 41 is elastically restored downward and holds the optical fiber cable 11 downward. hold

[0046] Note that when pulling out the optical fiber cable 11, hold the elastic piece 41 with a jig. Just let it rise and then remove it.

[0047] The same effects as in the first embodiment can also be obtained by the above operation.

[0048] It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be modified within the scope of the present invention. Of course, many modifications and changes may be made to the embodiments described.

[0049] For example, in the first embodiment, the engagement piece 31 is attached to the holding body 18, and the engagement groove 32 is attached to the holding body. 14, the engagement piece 31 was provided on the holding body 14, and the engagement groove 32 was provided on the holding body 18. may be provided respectively.

[0050]

[Effect of the idea]

As is clear from the above explanation, according to claims 1, 3, and 4 of the present invention, within the holding body, A clamping body for sandwiching the optical fiber cable and a pressing means for pressing the clamping body are provided. Because it has a ferrule, the optical fiber cable can be held in place without using a ferrule. This makes it possible to reduce the number of parts, downsize the holder, and reduce manufacturing costs.

[0051] According to claim 2 of the present invention, a groove for sandwiching and holding an optical fiber cable. is formed eccentrically with respect to the optical axis of the optical fiber cable, so there is no wear caused by the groove. Compared to holding the optical fiber cable using only frictional force, the holding force can be improved. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of an optical transmission device showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA.

FIG. 3 is a sectional view taken along line BB.

FIG. 4 is a perspective view of an optical transmission device showing a second embodiment of the present invention.

FIG. 5 is a sectional view taken along the line CC.

FIG. 6 is a perspective view showing a conventional optical transmission device.

[Explanation of symbols]

11 Optical fiber cable 12 Optical semiconductor device 13 Insertion hole 14 Holding body 15 Recess 16 Aperture 17 Bottom wall 18 Holding body 19 Pressing means 27, 28 groove 31 Engagement piece 32 Engagement groove 41 Elastic piece

Claims (4)

[Scope of utility model registration request] 1. An optical fiber cable, an optical semiconductor element that transfers light between the optical fiber cable, and a device for inserting the optical fiber cable so that an end of the optical fiber cable faces the optical semiconductor element. a holder having an insertion hole; a recess formed to communicate with the insertion hole of the holder and open in a direction perpendicular to the optical axis of the optical fiber cable; An optical transmission device comprising: a clamping body for clamping and fixing a fiber cable; and a pressing means for pressing the clamping body against the bottom wall of an insertion hole. 2. The optical transmission device according to claim 1, wherein grooves having substantially the same diameter as the optical fiber cable are formed facing each other in the bottom wall of the recess and the opposing surfaces of the holding body, and both grooves are An optical transmission device characterized in that it is formed eccentrically with respect to the optical axis of an optical fiber cable. 3. The pressing means according to claim 1 includes an engaging piece provided on one of the holding body and the clamping body to engage with the other, and an engaging piece provided on the other body and engaged with the engaging piece. 1. An optical transmission device comprising: an engagement groove for a purpose. 4. The pressing means according to claim 1 is comprised of an elastic piece that is integrally formed between the holding body and the clamping body and is elastically deformable so as to bias the clamping body toward the bottom wall of the insertion hole. An optical transmission device characterized by: